The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 09, 2017
Filed:
Sep. 07, 2010
Bernd Frankenstein, Ullersdorf, DE;
Frank Schubert, Dresden, DE;
Lars Schubert, Schönteichen OT Petershain, DE;
Eberhard Schulze, Pulsnitz, DE;
Herbert Friedmann, Altertheim, DE;
Fritz-otto Henkel, Höchberg, DE;
Carsten Ebert, Groβpösna, DE;
Bernd Frankenstein, Ullersdorf, DE;
Frank Schubert, Dresden, DE;
Lars Schubert, Schönteichen OT Petershain, DE;
Eberhard Schulze, Pulsnitz, DE;
Herbert Friedmann, Altertheim, DE;
Fritz-Otto Henkel, Höchberg, DE;
Carsten Ebert, Groβpösna, DE;
Wölfel Engineering GmbH + Co. KG, Höchberg, DE;
Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V., München, DE;
Abstract
The invention relates to a method for monitoring the condition of rotor blades for wind turbines. It is therefore the object of the invention to increase the accuracy of the monitoring of the condition of rotor blades of wind turbines and to allow a localization of faults or defects and their exact description. In the method in accordance with the invention, eigenvibrations of a rotor blade occurring globally at the rotor blade and locally guided elastic waves are permanently detected with time and spatial resolution using a sensor network and actuator network attached to the rotor blade or using a network arrangement of ultrasound transducers. In addition, elastic waves which are guided periodically at predefinable time intervals and which are respectively emitted by an actuator or ultrasound transducer and detected by sensors or ultrasound transducers are in so doing inspected for variations of the emitted waves.